Superconducting Microbeam Converter With High Kinetic Inductance
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Solution Overview
Problem
Current electromechanical conversion devices for quantum computing face challenges in achieving high conversion efficiency between microwave and optical frequency ranges due to high parasitic capacitances and complex manufacturing processes, which limit the electromagnetic coupling factor.
Innovation Solution
The design incorporates an electric track with a superconductive material and geometry that achieves a high kinetic inductance, reducing parasitic capacitances and enhancing electromagnetic coupling, without the need for windings, using a microbeam structure with electrodes on a membrane to vary capacitance during oscillation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional inductance structures with windings are used, then sufficient inductance value can be achieved, but parasitic capacitances increase and device complexity increases
Solution Approach 1:
The patent replaces the traditional mechanical winding structure with a superconducting electric track that generates kinetic inductance. This substitution eliminates the need for complex coil windings and significantly reduces parasitic capacitances while maintaining the required inductance value, thereby improving conversion efficiency between microwave and optical photons.
Solution Approach 2:
The patent changes the fundamental parameter of inductance generation from magnetic inductance (via windings) to kinetic inductance (via superconducting electron flow). By utilizing the kinetic inductance of superconducting electrons in the electric track, the system achieves the necessary inductance with minimal parasitic capacitance, resolving the contradiction between sufficient inductance and low parasitic capacitance.
2Reliability
If traditional inductance structures with windings are used, then sufficient inductance value can be achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces the mechanical winding structure with a superconducting electric track that generates kinetic inductance. This substitution eliminates the need for complex coil windings and significantly reduces parasitic capacitances while maintaining the required inductance value, thereby improving conversion efficiency between microwave and optical photons.
3Reliability
If capacitor electrode vibration is used to vary capacitance, then electromagnetic coupling can be achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs a movable capacitor electrode that vibrates at mechanical resonance frequencies to dynamically modulate the capacitance. This dynamic approach enables electromechanical coupling without requiring extremely precise static positioning, as the coupling is achieved through controlled motion rather than fixed alignment, thereby reducing manufacturing precision requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach increases the electromagnetic coupling factor, leading to improved conversion efficiency and simplified manufacturing, enabling more effective transfer of quantum information across different frequency ranges.
Implementation Method 1
an electric track with a superconductive material and geometry that achieves a high kinetic inductance
Implementation Method 2
the electrical capacitance of the capacitor varies when the microbeam oscillates
Data Source
AI summary
An electromechanical conversion device includes a resonant electrical circuit comprising an inductance and a capacitor, the capacitor including at least a first electrode and a second electrode; and a mechanical oscillator including at least one microbeam formed in a membrane, the first and second electrodes being located side by side and the first electrode of the capacitor being located on a face of the microbeam so that the electrical capacitance of the capacitor varies when the mechanical oscillator oscillates; device wherein the inductance includes an electric track of very low thickness made on the membrane and made of a superconductive material chosen so as to obtain an electric track with a high kinetic inductance.